host_hid.c File Reference

#include <stddef.h>
#include "compiler.h"
#include "conf_usb.h"
#include "usb_task.h"
#include "usb_host_task.h"
#include "usb_host_enum.h"
#include "hid.h"
#include "host_hid.h"

Functions
Standard Requests Applied to HID
Status_t	host_hid_get_descriptor (uint8_t descriptor_type, uint8_t descriptor_index, uint8_t s_interface)
	Gets a HID class descriptor. More...
Status_t	host_hid_set_descriptor (uint8_t descriptor_type, uint8_t descriptor_index, uint8_t s_interface, uint16_t length)
	Sets a HID class descriptor. More...
HID-Specific Requests
Status_t	host_hid_get_report (uint8_t report_type, uint8_t report_id, uint8_t s_interface)
	Gets a HID report. More...
Status_t	host_hid_set_report (uint8_t report_type, uint8_t report_id, uint8_t s_interface, uint16_t length)
	Sets a HID report. More...
uint8_t	host_hid_get_idle (uint8_t report_id, uint8_t s_interface)
	Reads the current idle rate for a particular Input report. More...
Status_t	host_hid_set_idle (uint8_t duration_4_ms, uint8_t report_id, uint8_t s_interface)
	Silences a particular report on the Interrupt In pipe until a new event occurs or the specified amount of time passes. More...
uint8_t	host_hid_get_protocol (uint8_t s_interface)
	Reads which protocol is currently active (either the boot protocol or the report protocol). More...
Status_t	host_hid_set_protocol (uint8_t protocol, uint8_t s_interface)
	Switches between the boot protocol and the report protocol (or vice versa). More...
HID Report Descriptor Parsing Functions
Status_bool_t	host_hid_get_item (host_hid_item_t *item)
	Gets the next HID report descriptor item. More...

Variables
struct {
const hid_item_t *   item
size_t   length
}	host_hid_report_descriptor_parser
	HID report descriptor parser control structure. More...

Status_t host_hid_get_descriptor	(	uint8_t	descriptor_type,
		uint8_t	descriptor_index,
		uint8_t	s_interface
	)

Gets a HID class descriptor.

Parameters

descriptor_type	Type of the descriptor to get.
descriptor_index	Index of the descriptor to get.
s_interface	The supported interface number of which to get the descriptor.

Returns

Status.

References S_usb_setup_data::bmRequestType, hid_descriptor_t::bNumDescriptors, S_usb_setup_data::bRequest, hid_descriptor_t::bType, data_stage, hid_descriptor_t::Descriptor, GET_DESCRIPTOR, Get_interface_number, HID_DESCRIPTOR, HID_REPORT_DESCRIPTOR, host_hid_report_descriptor_parser, host_transfer_control(), S_usb_setup_data::incomplete_read, SIZEOF_DATA_STAGE, usb_format_usb_to_mcu_data, usb_request, S_usb_setup_data::wIndex, S_usb_setup_data::wLength, hid_descriptor_t::wLength, and S_usb_setup_data::wValue.

uint8_t host_hid_get_idle	(	uint8_t	report_id,
		uint8_t	s_interface
	)

Reads the current idle rate for a particular Input report.

Parameters

report_id	ID of the report of which to get the idle rate.
s_interface	The supported interface number of which to get the idle rate.

Returns

Idle duration with a 4-ms resolution, or HID_IDLE_DURATION_INDEFINITE.

References S_usb_setup_data::bmRequestType, S_usb_setup_data::bRequest, data_stage, Get_interface_number, HID_GET_IDLE, host_transfer_control(), S_usb_setup_data::incomplete_read, usb_request, S_usb_setup_data::wIndex, S_usb_setup_data::wLength, and S_usb_setup_data::wValue.

Status_bool_t host_hid_get_item

(

host_hid_item_t *

item

)

Gets the next HID report descriptor item.

Parameters

item	Pointer to the item structure to fill.

Returns

Status.

Note

host_hid_get_descriptor must have been called before this function for HID_DESCRIPTOR and HID_REPORT_DESCRIPTOR.

References hid_item_t::bDataSize, hid_item_t::bLongItemTag, hid_item_t::bSize, hid_item_t::bTag, hid_item_t::bType, hid_item_t::data, hid_item_t::header, HID_ITEM_TAG_LONG_ITEM, host_hid_report_descriptor_parser, host_hid_item_t::long_data, host_hid_item_t::long_format, hid_item_t::long_format, host_hid_item_t::short_data, hid_item_t::short_format, host_hid_item_t::tag, host_hid_item_t::type, usb_format_usb_to_mcu_data, and hid_short_item_data_t::value.

uint8_t host_hid_get_protocol

(

uint8_t

s_interface

)

Reads which protocol is currently active (either the boot protocol or the report protocol).

Parameters

s_interface

The supported interface number of which to get the protocol.

Returns

Protocol: HID_BOOT_PROTOCOL or HID_REPORT_PROTOCOL.

Note

This request is supported by devices in the Boot subclass.

References S_usb_setup_data::bmRequestType, S_usb_setup_data::bRequest, data_stage, Get_interface_number, HID_GET_PROTOCOL, host_transfer_control(), S_usb_setup_data::incomplete_read, usb_request, S_usb_setup_data::wIndex, S_usb_setup_data::wLength, and S_usb_setup_data::wValue.

Status_t host_hid_get_report	(	uint8_t	report_type,
		uint8_t	report_id,
		uint8_t	s_interface
	)

Gets a HID report.

Parameters

report_type	Type of the report to get.
report_id	ID of the report to get.
s_interface	The supported interface number of which to get the report.

Returns

Status.

References S_usb_setup_data::bmRequestType, S_usb_setup_data::bRequest, data_stage, Get_interface_number, HID_GET_REPORT, host_transfer_control(), S_usb_setup_data::incomplete_read, SIZEOF_DATA_STAGE, usb_request, S_usb_setup_data::wIndex, S_usb_setup_data::wLength, and S_usb_setup_data::wValue.

Referenced by host_mouse_hid_task().

Status_t host_hid_set_descriptor	(	uint8_t	descriptor_type,
		uint8_t	descriptor_index,
		uint8_t	s_interface,
		uint16_t	length
	)

Sets a HID class descriptor.

Parameters

descriptor_type	Type of the descriptor to set.
descriptor_index	Index of the descriptor to set.
s_interface	The supported interface number of which to set the descriptor.
length	Length of the descriptor to set.

Returns

Status.

References S_usb_setup_data::bmRequestType, S_usb_setup_data::bRequest, data_stage, Get_interface_number, host_transfer_control(), S_usb_setup_data::incomplete_read, length, SET_DESCRIPTOR, usb_request, S_usb_setup_data::wIndex, S_usb_setup_data::wLength, and S_usb_setup_data::wValue.

Status_t host_hid_set_idle	(	uint8_t	duration_4_ms,
		uint8_t	report_id,
		uint8_t	s_interface
	)

Silences a particular report on the Interrupt In pipe until a new event occurs or the specified amount of time passes.

Parameters

duration_4_ms	Idle duration with a 4-ms resolution, or HID_IDLE_DURATION_INDEFINITE.
report_id	ID of the report of which to set the idle rate (can be HID_REPORT_ID_ALL).
s_interface	The supported interface number of which to set the idle rate.

Returns

Status.

References S_usb_setup_data::bmRequestType, S_usb_setup_data::bRequest, data_stage, Get_interface_number, HID_SET_IDLE, host_transfer_control(), S_usb_setup_data::incomplete_read, usb_request, S_usb_setup_data::wIndex, S_usb_setup_data::wLength, and S_usb_setup_data::wValue.

Referenced by host_mouse_hid_task().

Status_t host_hid_set_protocol	(	uint8_t	protocol,
		uint8_t	s_interface
	)

Switches between the boot protocol and the report protocol (or vice versa).

Parameters

protocol	Protocol: HID_BOOT_PROTOCOL or HID_REPORT_PROTOCOL.
s_interface	The supported interface number of which to set the protocol.

Returns

Status.

Note

This request is supported by devices in the Boot subclass.

When initialized, all devices default to the report protocol. However, the host should not make any assumptions about the device's state and should set the desired protocol whenever initializing a device.

References S_usb_setup_data::bmRequestType, S_usb_setup_data::bRequest, data_stage, Get_interface_number, HID_SET_PROTOCOL, host_transfer_control(), S_usb_setup_data::incomplete_read, usb_request, S_usb_setup_data::wIndex, S_usb_setup_data::wLength, and S_usb_setup_data::wValue.

Status_t host_hid_set_report	(	uint8_t	report_type,
		uint8_t	report_id,
		uint8_t	s_interface,
		uint16_t	length
	)

Sets a HID report.

Parameters

report_type	Type of the report to set.
report_id	ID of the report to set.
s_interface	The supported interface number of which to set the report.
length	Length of the report to set.

Returns

Status.

References S_usb_setup_data::bmRequestType, S_usb_setup_data::bRequest, data_stage, Get_interface_number, HID_SET_REPORT, host_transfer_control(), S_usb_setup_data::incomplete_read, length, usb_request, S_usb_setup_data::wIndex, S_usb_setup_data::wLength, and S_usb_setup_data::wValue.

struct { ... } host_hid_report_descriptor_parser

Initial value:

=
{
  0,
  NULL
}

HID report descriptor parser control structure.

Referenced by host_hid_get_descriptor(), and host_hid_get_item().

const hid_item_t* item

size_t length

Referenced by host_hid_set_descriptor(), and host_hid_set_report().